Drafting pen



April 18, 1933.

H. FRANK DRAFTING PEN Filed June 25, 1932 INVENTOR /VEA/Qy /CQA/V/f.

{Z/ AT1-0R EYS Patented Apr. 18, 1933 g Y:HENRY rnANx, or BROQKLYN, NEW YORK p DRAETING :PEN

- AApplication 'filed June 25,

" This invention relates tov new and useful improvements 1n writing instruments and more ruling pens and the like.

- 5 5 It is one object lof the invention to provide a ruling pen ofnew and novel construction by means of which clear, sharp and distinct lines may be drawn. Y VIt is a further object of'theJinvent'ion so to @o construct a device fof this'characterthat a suiiicient quantity of writingtluid may be carried thereby to provide for use of the pen withoutl necessitating frequent supply of writing fluid thereto. Y f Y.

In ruling pens as generally constructed, it isnecessary to wipeo' Vthe point or points after the writing fluid has been applied there- Ato and it is a further ,object of the present invention, so to construct a ruling pen that 2 this wiping off of the point or'points each Ytimejthe fluid Iis appliedthereto will not be Ynecessary. V- Y v Y :Other objectsofthe invention will appear -as the nature thereofis zbetter understood vandk by reference to the accompanying drawing and the following. specification forming `a part of this application. t

1 In the drawing,

Figure 1 is a View inelevation of a com- 130 plete pen `constructed )in `accordance with the present-invention, i i

Figure 2 is asimilar view partly 1n section and with a portion of the pen removed, Figure 3 is a detail sectional view on an enf-i largedscale illustrating the construction of the writing head of the pen,

.Figure 4 is a plan Vview of `the writing head ofthepen, l Y Y Figure A5 is an end view of the writing 140 head of the pen, Y v

Figure 6 isa detailisectionalviewoi the writing head taken'on the line 6-6 of `Figure lLand'` 't j Figlire Tis a fragmentary view illustrating 45 the manner in which a protectin'gcap is re- Vmovedfrom the pen. Referring ,more particularly-to ithe drawing the reference character 10 designates the main body portion ofbarrelfof-the pen. This :50 harrellO thasits fone* end closed by `a plug. .11

particularly,itpertains to pens such as tion27'owhich corresponds iinptaper to that ot! 1932. semi iva-619,246. j

whichgmay be-or1 any ornamental form and adj acent this-end thebarrel is .provided with a plurality of V.openings-12 which provide for communication between the interior thereof and atmosphere. The opposite endv of the .5.5 barrel 10 is provided with an internal thread 13, This thread 13 may be formedin a bushing or thickened wall portion 14 as best illustrated in Figure 3. 'The reference character 1ro-designates the writing head.;A This'writing head preferably has a cylindrical body portion V16 and a tapered body portion 17 Vwhich latter terminatesat its smallest diameter in a Vfurcated writing point Ior end ,18. lrojecting.from65 the cylindrical portion lthere is'` a reduced threaded extension 19 having a passageY 20 which.k extends therethrough and which-has Y ycommu'nication with theinteri-or of the writing head 1.5 whichlatter is hollow. The re--'m duced screw threaded extension 19 isadapted for threaded engagement with theV thread 18 heretoforementioned, kto provide for re- .movably attaching the writing head to the barrel and the passage 20 provides for com U munication of the interior. offthe writing yheadwith the Vatmosphere through the hollow barrel 10 andthe openings 12.

The vwriting head V15 is Av:formed with relatively narrow longitudinal 'extending elon--in 4gated recesses 1.21, the 'side walls 22 oi which are bevelled andwhich convergel in thedirection Vvof fthe `:turca-ted Vend 18 of thel writing head the recesses terminating at this end in the spaces between the turca-tions of said ur-`V` 89 cated end. These recesses 21 preierably pass entirely through the side walls vofthe `tapered portion 17 of the writing Afheadand in `the present vembodiment of the invention lfour* such recessesareemployed.; y y At all times, exceptsuch times asthe pen is being supplied with writing fluid, the writing head is enclosed withink a cap. This cap -is designated by the reference character 25 l.in the drawing and conformsrgenerally in '95 shape to the shape of the Writing head. The cap is adapted to-have- .frictional engagement with Athe writing head' Aas designated bythe reference numeral 2,6 yand has a .tapered porthe writing head 15. The cap 27 has its end of smallest diameter open as indicated at 28 and when in position upon the writing head this open endl 28 is adapted to receive the 5 furcations of the furcated end of the writing head as best illustrated in Figure 3.

Means may be provided to insure against accidental 'displacement of the 'cap 27 relative to the writing head 15 and in the present embodiment of the invention this means comprises a hook 30 which "is carriedby the end of the barrel 10. The cap25 has an an-A nular bead 31 extending around its largerV end and this bead has a cut-out portion 32. This cut-out portion 32 is of such dimension as to receive the Yhook 30 when the Ycap 2 5is positioned upon the writing head. The bead 31 is of such cross-sectional dimension that after the hook 30 has been passed through the cut-out portion 31, a turning of the cap 25 will-position'ia. portion of the bead 31 behind the hook 30 and thus prevent vacci- 4dental displacement of the cap 25. I

t is desirable thatthe cap 25 in addition to being iirmly held in position, be readily removable. 'The reason for this is 'that a plurality of caps having different sizes of openings 28 areinterchangeable with each writing head to provide for scribing of lines {of different character as to width, the width of line being determined by the Ysize of opening 28jin the cap 25. From an inspection of Figure 3 of the drawing it will be observed ythat when the cap 25r is in position the walls thereof cooperate with the writing'head l5 to form pockets in the upper ends of the b'eveledrecesses 22. Thus when the pen is not 'in use and is lying in a horizontal position any ink remaining in the head Will be-collected 'in the recesses and cannot work into Ythe barrel through the passage 20 since the lower end of the passage extends below the beveled upper edges of the recesses.

The device operatesin the following manner: Y

To use the pen, it being assumedthat the pen has not been used for some time, the Vcap 25 isremoved and the writing head inserted to which the pen is inserted into' the writing fluid. After this has been done, the cap,'to produce the desired line, is selected and placed upon the writing head and moved to the position in rwhich the hook 30 will pass through the cut-out portion 32 of the annular body 31 after which the cap is turned to secure the same against accidental displacements as heretofore described.

The pen is now ready for use and is mainto a'suitable container of writing luid.

writing head will be determined by the depth l nipulated in the ordinary manner, the ink flowing from the furcated end of the writing head as the same is moved in contact with the surface upon which the writing is to be eliected. The flow of ink is free by reason of the fact that the interior of the hollow writing head and the several recesses 21 have direct communication with atmosphere through the passage 20, the hollow barrel 10 and the openings 12.v

I have found inactual practice that a writing pen constructed in accordance with the present invention is highly satisfactory for the purpose intended and that the supply of the Writing fluid which maybe handled by the pen is considerably greater than can be handled by ruling pens as generally constructed- Further, I have found that in using a pen such as herein disclosed wiping of the Vpoint becomes entirely unnecessary after each application of writing fluid tolthe pen as distinguished from ruling pens as ordinarily constructed.

The invention been herein .7' disclosed in a preferred'form but it is to be understood that the invention is vnot to be limited to the specific construction herein shown and that it may be embodied in other forms which rightfully fall within the scope ofthe appended y Y claims.

Having thus described the invention', what is claimed as newfand what .itis desired to secure by Letters-Patent of the United States,-is; f, .,jf 1

. 1. A writing pen comprising` a vented barrel, a hollow writing-head carried by the barrel and having a passage providing communication with the barrel, said head also having a furcated writing end and a pluralh p vity of openingsl in its walls, and a closely" itted cap removably carried by the head having a discharge opening adjacent the furcated end of the head, thewalls ofthe cap cooperating with'the head to form recesses at' the upper edges of the openings, the lower endof the passage terminatingV below the-recesses to prevent* the iovvy ofk iuid from the head into the barrel. v

2. A writing pen comprising a .vented` barrel5 a hollow Writing head carried-byY the* barrel, the outerk end ofthe head tapering and terminating'in a ,-furcated; wiring end,

said head having openings in its walls with the edges of the openings beveled and aclose-AA Vly litted cap removably mounted on the-head,"

the walls ofv thecap cooperating with the head to form-recesses at'the upper bevelled edges of the openings to prevent the flow of Huid from the head into the barrel. A

/ 3. A writing" pen comprisingl Ya vented barrel, a hollow writing head carried by the barrel and having its walls tapered and terminating in a furcatedwriting end said wallsVA having longitudinalropenings communicating with the hollow interior ofthe head, the edges of the openings being beveled and converging at one end and terminating in the spaces between the furcations at the urcated end of the head and a closely tting cap removably secured over the head and having a discharge opening in its end adjacent the furcated end of the head, the Walls of the cap cooperating with the beveled edges of the openings to form recesses Within which to collect fluid from the head when the pen is not in its Writing position.

Signed at New York, New York, this 24th day of June, 1932.

HENRY FRANK. 

